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TI-2021-16247 Aliases CVE-2021-38674GHSA-6m9q-p58f-wq5w

Reflected XSS Vulnerability in TFTP

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

A cross-site scripting (XSS) vulnerability has been reported to affect QTS, QuTS hero and QuTScloud. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of QTS, QuTS hero and QuTScloud: QuTS hero h4.5.4.1771 build 20210825 and later QTS 4.5.4.1787 build 20210910 and later QuTScloud c4.5.7.1864 and later

Why it matters now

EPSS 0.00657 51st percentileScored 2026-11-07
Fix Fixed QuTS hero (QNAP Systems Inc.): h4.5.4.1771 build 20210825QTS (QNAP Systems Inc.): 4.5.4.1787 build 20210910+1 more product

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
QNAPQuTS herobefore h4.5.4.1771 build 20210825h4.5.4.1771 build 20210825Patch availableCNA
QNAPQTSbefore 4.5.4.1787 build 202109104.5.4.1787 build 20210910Patch availableCNA
QNAPQuTScloudbefore c4.5.7.1864c4.5.7.1864Patch availableCNA
  • QuTS hero VendorQNAP Affected before h4.5.4.1771 build 20210825 Fixed in h4.5.4.1771 build 20210825 Patch available CNA
  • QTS VendorQNAP Affected before 4.5.4.1787 build 20210910 Fixed in 4.5.4.1787 build 20210910 Patch available CNA
  • QuTScloud VendorQNAP Affected before c4.5.7.1864 Fixed in c4.5.7.1864 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*before 4.5.4.1787VulnerableQNAP
cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*before h4.5.4.1771VulnerableQNAP
cpe:2.3:o:qnap:qutscloud:*:*:*:*:*:*:*:*before c4.5.7.1864VulnerableQNAP
  • cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:* Versions before 4.5.4.1787 Vulnerable ·QNAP
  • cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:* Versions before h4.5.4.1771 Vulnerable ·QNAP
  • cpe:2.3:o:qnap:qutscloud:*:*:*:*:*:*:*:* Versions before c4.5.7.1864 Vulnerable ·QNAP

Remediation

  • Fix · CNA QuTS hero (QNAP Systems Inc.) Fixed in h4.5.4.1771 build 20210825
  • Fix · CNA QTS (QNAP Systems Inc.) Fixed in 4.5.4.1787 build 20210910
  • Fix · CNA QuTScloud (QNAP Systems Inc.) Fixed in c4.5.7.1864

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-38674
  2. 2026-10-03 Alias added: GHSA-6m9q-p58f-wq5w
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Advisory 1

  • TI-2020-02221 Command Injection Vulnerability in QTS and QuTS hero KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05101 Improper input validation in QNAP NAS devices KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-14137 Improper input validation in QNAP QTS KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-14131 Cross-site scripting in QNAP QTS KEVCVSS 3.1HIGH 8.0
See all 282 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences